使用gridlayout添加按钮

Question

我正在尝试制作一个由9x9 JButton制作的简单的tic tac toe board.我使用了二维数组和一个gridlayout,但结果是什么,没有任何按钮的框架.我做错了什么？

import java.awt.GridLayout;
import javax.swing.*;


public class Main extends JFrame
{
    private JPanel panel;
    private JButton[][]buttons;
    private final int SIZE = 9;
    private GridLayout experimentLayout;
    public Main()
    {
        super("Tic Tac Toe");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(500,500);
        setResizable(false);
        setLocationRelativeTo(null);

        experimentLayout =  new GridLayout(SIZE,SIZE);

        panel = new JPanel();
        panel.setLayout(experimentLayout);


        buttons = new JButton[SIZE][SIZE];
        addButtons();


        add(panel);
        setVisible(true);
    }
    public void addButtons()
    {
        for(int k=0;k<SIZE;k++)
            for(int j=0;j<SIZE;j++)
            {
                buttons[k][j] = new JButton(k+1+", "+(j+1));
                experimentLayout.addLayoutComponent("testName", buttons[k][j]);
            }

    }


    public static void main(String[] args) 
    {
        new Main();

    }

}

addButton方法是将按钮添加到数组中,然后直接添加到面板中.

Answer 1

您需要将按钮添加到您的JPanel:

public void addButtons(JPanel panel) {
   for (int k = 0; k < SIZE; k++) {
      for (int j = 0; j < SIZE; j++) {
         buttons[k][j] = new JButton(k + 1 + ", " + (j + 1));
         panel.add(buttons[k][j]);
      }
   }
}